Design On Mechanical Arm Applied To Monitor Anchor Screws In The Cast Steel Pedestal For PC Track Girder

As one of forerunner urban traffic systems, straddle-type monorail traffic system was presented in Japanese and the occident in 1960s. But publications about technical development on monitoring on-line the health of anchor screws in the cast steel pedestal for prestressed concrete track girder can not be found. Depending on the project of monitoring system on the health of anchor screws in the cast steel pedestal for prestressed concrete track girder, this paper is accomplished according to the solving and study of problems appeared with the progress of the project.In this paper the structural style of anchor screws mechanical arm in the cast steel pedestal for prestressed concrete track girder is analyzed detailedly. And then in response to its deformation and the principle of force balance, the load of mechanical arm is solved. Analysis on natural vibration characteristic of mechanical arm in the mechanical system is carried out in condition of physical constraint, and their ten lowest natural frequencies and mode shapes are obtained. For improving vibration resistance ability of the mechanical system and reduction of weight, according to the calculation results, weak links and resonance regions are discussed in order to give optimum design some reference frames.